English: The Tiger-Mörser, 38cm RW61 auf Sturm(panzer)mörser Tiger, or Sturmmörser Tiger, more commonly known as the Sturmtiger or Sturmpanzer VI, was a World War II heavy German assault gun built on the Panzer VI Tiger I chassis armed with a large caliber naval rocket mortar, the 38cm SturmMörser RW61 L/5,4